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<?php |
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namespace Zewa; |
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use Zewa\HTTP\Request; |
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/** |
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* View management |
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* |
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* @author Zechariah Walden<zech @ zewadesign.com> |
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*/ |
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class View |
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{ |
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/** |
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* Active layout for view |
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* |
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* @var string|bool |
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*/ |
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protected $layout; |
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private $pathToView; |
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private $pathToLayout; |
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/** @var array */ |
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protected $viewQueue = []; |
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/** |
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* Rendered view content |
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* |
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* @var string |
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*/ |
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protected $view = false; |
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/** |
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* Data object for view |
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* |
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* @var object |
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*/ |
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protected $properties; |
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/** |
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* \Zewa\Config reference |
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* |
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* @var Config |
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*/ |
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protected $configuration; |
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/** |
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* \Zewa\Router reference |
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* |
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* @var Router |
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*/ |
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protected $router; |
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/** |
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* \Zewa\Router reference |
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* |
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* @var Router |
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*/ |
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protected $request; |
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/** @var Container */ |
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protected $container; |
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/** |
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* @var array |
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*/ |
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private $queuedJS = []; |
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/** |
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* @var array |
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*/ |
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private $queuedCSS = []; |
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/** |
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* Load up some basic configuration settings. |
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*/ |
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public function __construct(Config $config, Router $router, Request $request, Container $container) |
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{ |
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$this->configuration = $config->get('view'); |
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$this->router = $router; |
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$this->request = $request; |
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$this->container = $container; |
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$this->pathToView = $this->configuration['viewPath']; |
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$this->pathToLayout = $this->configuration['layoutPath']; |
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} |
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/* |
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* @todo create method for returning |
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* a valid json string with header.. |
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* view shouldn't set header logic, |
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* and the framework doesn't care what returns the string |
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* ..but view should handle the json_encode... |
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* seems overkill to call header() with returning a $view->json; |
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* thoughts?*/ |
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/** |
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* Loads a view |
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* |
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* @access public |
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* @param string|bool $view view to load |
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* @param string|bool $layout |
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* @return string |
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*/ |
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public function render($view = false, $layout = false) |
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{ |
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if ($layout !== false) { |
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$this->setLayout($layout); |
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} |
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if ($view !== false) { |
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$this->setView($view); |
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} |
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return $this->bufferResponse(); |
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} |
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/** |
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* formats and prepares view for inclusion |
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* @param $viewName |
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* @return string |
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* @throws Exception\LookupException |
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*/ |
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public function setView($viewName) |
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{ |
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$view = $this->pathToView . DIRECTORY_SEPARATOR . strtolower($viewName) . '.php'; |
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if (!file_exists($view)) { |
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throw new Exception\LookupException('View: "' . $view . '" could not be found.'); |
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} |
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$this->viewQueue[$viewName] = $view; |
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} |
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public function getView($view = null) |
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{ |
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if ($view !== null) { |
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return $this->viewQueue[$view]; |
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} else { |
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return $this->viewQueue; |
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} |
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} |
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public function setProperty($value, $primitive = null) |
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{ |
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$container = $this->container->has('view_properties') ? $this->container->get('view_properties') : []; |
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if ($primitive === null) { |
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$container = $value; |
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} else { |
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$container[$value] = $primitive; |
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} |
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$this->container->set('view_properties', $container); |
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} |
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public function getProperty(string $key = null, $default = null) |
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{ |
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$container = $this->container->has('view_properties') ? $this->container->get('view_properties') : []; |
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if ($key === null) { |
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return $container; |
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} |
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return $this->container->get('view_properties')[$key] ?? $default; |
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} |
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public function unsetProperty(string $key) |
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{ |
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$container = $this->container->has('view_properties') ? $this->container->get('view_properties') : []; |
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if (!empty($container[$key])) { |
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unset($container[$key]); |
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$this->container->set('view_properties', $container); |
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} |
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} |
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public function setLayout($layout = null) |
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{ |
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if ($layout === null) { |
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$this->layout = null; |
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return; |
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} |
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$layout = $this->pathToLayout . DIRECTORY_SEPARATOR . strtolower($layout) . '.php'; |
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if (!file_exists($layout)) { |
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throw new Exception\LookupException('Layout: "' . $layout . '" could not be found.'); |
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} |
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$this->layout = $layout; |
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return; |
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} |
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public function getLayout() |
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{ |
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return $this->layout; |
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} |
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private function renderViews() : string |
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{ |
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$views = ""; |
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foreach ($this->viewQueue as $view) { |
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//if not end.. otherwise include \r\n |
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$views .= $this->buffer($view); |
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} |
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return $views; |
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} |
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private function bufferResponse() : string |
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{ |
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$this->view = $this->renderViews(); |
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if ($this->layout !== null) { |
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return $this->buffer($this->layout); |
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} |
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return $this->view; |
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} |
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private function buffer(string $path) |
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{ |
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ob_start(); |
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$container = $this->container->has('view_properties') ? $this->container->get('view_properties') : []; |
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if (!empty($container)) { |
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extract($container); // yuck. could produce undeclared errors. hmm.. |
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} |
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//should i set $this->data in abstract controller, and provide all access vars ? seems bad practice.. |
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include $path; |
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$response = ob_get_contents(); |
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ob_end_clean(); |
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return $response; |
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} |
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/** |
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* Helper method for grabbing aggregated css files |
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* |
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* @access protected |
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* @return string css includes |
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*/ |
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public function fetchCSS() |
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{ |
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$string = ""; |
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if (empty($this->queuedCSS)) { |
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return $string; |
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} |
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foreach ($this->queuedCSS as $sheet) { |
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$string .= '<link rel="stylesheet" href="' . $sheet .'">' . "\r\n"; |
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} |
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return $string; |
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} |
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/** |
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* Helper method for grabbing aggregated JS files |
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* |
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* @access protected |
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* @return string JS includes |
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*/ |
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public function fetchJS() |
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{ |
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$string = "<script>baseURL = '" . $this->router->baseURL() . "/'</script>\r\n"; |
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if (empty($this->queuedJS)) { |
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return $string; |
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} |
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foreach ($this->queuedJS as $script) { |
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$string .= '<script src="' . $script . '"></script>' . "\r\n"; |
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} |
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return $string; |
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} |
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/** |
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* Helper method for adding css files for aggregation/render |
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* |
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* @access public |
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* @param $files array |
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*/ |
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public function addCSS($files = []) |
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{ |
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$this->queuedCSS = array_merge($files, $this->queuedCSS); |
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} |
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public function addJS($files = []) |
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{ |
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$this->queuedJS = array_merge($files, $this->queuedJS); |
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} |
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/** |
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* Set 404 header, and return 404 view contents |
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* |
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* @access public |
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* @return string |
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*/ |
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public function render404() |
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{ |
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header('HTTP/1.1 404 Not Found'); |
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$this->setLayout('404'); |
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return $this->render(); |
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} |
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} |
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Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.
Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..